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Materials > Material types > Fluid material properties > Fluid materialsfor heat transfer and flow analyses

Homogeneous Gas Mixture

Use the Homogeneous Gas Mixture modeling object to model a gas-gas mixture that contains miscible species, such as carbon monoxide in air.

You can define up to five gases in the mixture, including the primary gas.

You define a Homogeneous Gas Mixture modeling object in the 3D mesh collector.

Note:

The software does not migrate the general Scalar modeling object found in versions previous to NX 7.5 to the Homogeneous Gas Mixture modeling object. You must manually update your model to use the Homogeneous Gas Mixture modeling object.

Where do I find it?

Application Pre/Post
Command Finder Modeling Objects
Location in the dialog box Type list→Homogeneous Gas MixtureCreate
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Homogeneous Gas Mixture, Simcenter 3D 2021.1 Series

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Source: https://docs.sw.siemens.com/en-US/doc/289054037/PL20200601120302950.advanced/id966197 · retrieved 2026-07-17